Motors: expansible chamber type – Plural relatively movable or rigidly interconnected working... – With means for selectively changing the speed or force...
Patent
1994-02-03
1994-11-08
Look, Edward K.
Motors: expansible chamber type
Plural relatively movable or rigidly interconnected working...
With means for selectively changing the speed or force...
91419, 92 29, 92151, F15B 1116, F01B 2100
Patent
active
053616804
ABSTRACT:
In a pressure-intensifying type fluid pressure cylinder, an auxiliary cylinder chamber is provided outside a rod cover, a pressure intensifying piston is axially and slidably disposed on the outer peripheral portion of a piston rod in the auxiliary cylinder chamber, and steel balls are disposed around the piston rod in space having a tapered surface in the pressure intensifying piston. Or, a lock concave portion is formed on the outer peripheral portion of the piston rod and a lock member is provided in the pressure intensifying piston which lock member makes the pressure intensifying piston and the piston rod one body by being fixed in the lock concave portion. When the piston rod reaches a little before the end of extrusion, fluid pressure comes through a way in the auxiliary cylinder chamber between the pressure intensifying piston and the rod cover. Here, the pressure intensifying piston moves, the lock member is fixed in the lock concave portion and the pressure intensifying piston is locked with regard to the piston rod, or, the steel balls for lock lock the pressure intensifying piston with regard to the piston rod, application force by the movement of the pressure intensifying piston which receives the fluid pressure is added to application force of the piston rod until the piston rod is extruded to the end position, and application force of the piston rod around the end of extrusion is increased.
REFERENCES:
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patent: 3918346 (1975-11-01), Ziegler
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patent: 4537113 (1985-08-01), Stoll et al.
patent: 4577732 (1986-03-01), Gottling
patent: 5018434 (1991-05-01), Haka
patent: 5174191 (1992-12-01), Leinweber et al.
Abstract of Japanese Patent No. JP-A-58 005 507, published Jan. 12, 1983.
Abstract of Japanese Patent No. JP-A-62 067 309, published Mar. 27, 1987.
Look Edward K.
Ryznic John
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